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--- installation_fp_sci [2023/08/18 09:35]
noji Added instructions for zeroing PTs.
+++ installation_fp_sci [2025/12/01 12:34] (current)
pereira [Venting FP Chamber]
@@ Line 14: / Line 14: @@
 ===== Emptying Detectors =====
+  - Verify that the High Voltages supplies for all focal plane detectors are turned off
   - Check that the system is in **RUN** mode on the “FP_State_Buttons” page under FRIB EXP Main → S800 → GHS Pages (Secondary Pages)
   - Return to “GHS_FP_Main” click **Enable MFC Controls**
@@ Line 25: / Line 26: @@
   - Ensure the beamline gate valve to the FP chamber is closed (BGV_D2671).
   - Ensure IG_D2686 is off.
-  - Notify the Control Room that EXP alarms may occur.
+  - Notify the Control Room and Vacuum Group that EXP alarms may occur.
   - On the “FP_State_Buttons” page, click VENT mode for both D2703 (CRDCs) and D2708 (Ion Chamber).
   - The detector volumes will be bypassed to the chamber. The TGV and TMP should handle the gas load and quickly pump the chamber back to high vacuum. If any issues occur, contact the Rare Isotope Operations Vacuum Group.
@@ Line 33: / Line 34: @@
 ===== Venting FP Chamber =====
-Notify the Control Room that you will vent the FP chamber.
+Notify the Control Room and Vacuum Group that you will vent the FP chamber.
   - Ensure the IG in the Focal Plane Pumping Station is off. This page can be found in FRIB EXP Main → S800 → Vacuum Main (Primary Pages) → Focal Plane.
@@ Line 81: / Line 82: @@
 ===== Zeroing PTs =====
-- When readings of the PTs (PT1 [S800_GHS:CMG_D2708A:VP_RD], PT2 [S800_GHS:CMG_D2703A:VP_RD], and PT3 [S800_GHS:CMG_D2708C:VP_RD]) are off (e.g. 1 Torr when pumped down), these need to be zeroed.
+  * When readings of the capacitance manometers (PT1 [S800_GHS:CMG_D2708A:VP_RD], PT2 [S800_GHS:CMG_D2703A:VP_RD], and PT3 [S800_GHS:CMG_D2708C:VP_RD]) are off (e.g. 1 Torr when pumped down), these need to be zeroed.
-- The relevant PVs are "ZERO_CMD" instead of "VP_RD", e.g. S800_GHS:CMG_D2708A:ZERO_CMD for PT1. Send "1" to zero these PTs.
+  * **Before “zeroing” a pressure gauge. Make sure it is completely bottomed out.** This would correspond to the GHS being in “Vent” mode and the TMP being on. If the IG is on and shows that the system is under High Vacuum (<10-3 Torr) you can go ahead and zero the gauge.
+  * Here are instructions with screenshots by Josh:
+    * {{::zeroingpressuregauges1.png|}}
+    * {{::zeroingpressuregauges2.png|}}
+    * {{::zeroingpressuregauges3.png|}}
+  * The relevant PVs are "ZERO_CMD" instead of "VP_RD", e.g. S800_GHS:CMG_D2708A:ZERO_CMD for PT1. Send "1" to zero these PTs.
 ====== Opening/closing FP chamber ======

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